CN109195240B - IGBT control circuit, control method, control circuit of heating electric appliance and heating electric appliance - Google Patents
IGBT control circuit, control method, control circuit of heating electric appliance and heating electric appliance Download PDFInfo
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- CN109195240B CN109195240B CN201811249285.7A CN201811249285A CN109195240B CN 109195240 B CN109195240 B CN 109195240B CN 201811249285 A CN201811249285 A CN 201811249285A CN 109195240 B CN109195240 B CN 109195240B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000006698 induction Effects 0.000 claims description 28
- 230000000087 stabilizing effect Effects 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
- H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
- H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
- H05B6/065—Control, e.g. of temperature, of power for cooking plates or the like using coordinated control of multiple induction coils
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- General Induction Heating (AREA)
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Abstract
The invention discloses an IGBT control circuit, a control method, a control circuit of a heating electric appliance and the heating electric appliance, which comprise at least two IGBTs, at least two switch selection circuits and a driving circuit which are respectively and correspondingly arranged with the IGBTs, wherein the input end of each IGBT is externally connected with the heating circuit, the output end of each IGBT is grounded, and the control end of each IGBT is connected with the corresponding switch selection circuit; the enabling end of each switch selection circuit is connected with the controller, the output end of each switch selection circuit is connected with the driving circuit, the driving end of each driving circuit is connected with the controller, the controller is provided with the enabling end corresponding to each switch selection circuit and the driving end corresponding to the driving circuit, and the driving circuit and each switch selection circuit are controlled to further control the on and off of the corresponding IGBT. The controller controls the driving circuit and each switch selection circuit to further control the on and off of the corresponding IGBT, so that the IGBT driving circuit is simplified, the reliability is high, the cost is low, and the application range is wide.
Description
Technical Field
The invention relates to the field of induction heating appliances, in particular to an IGBT control circuit, a control method, a control circuit of a heating appliance and the heating appliance.
Background
In recent years, home appliances such as an IH electric cooker and an Induction Heating (IH) have been favored by a large number of users because of their advantages such as rapid temperature rise and uniform heating. In many IH household appliances, a parallel resonance topology is adopted in a power circuit, and an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT) is generally adopted as a switch in the circuit to realize the parallel resonance of the circuit.
The IGBT is a compound full-control voltage-driven power semiconductor device composed of a bipolar transistor (Bipolar Junction Transistor, BJT) and an insulated gate field effect transistor (Insulated Gate Field Effect Transister, IGFET), and has the dual advantages of low conduction voltage drop of the BJT and high input impedance of the IGFET. Because the driving power of the IGBT is small and the saturation voltage is reduced, the IGBT is applied to the fields of alternating current motors, frequency converters, switching power supplies, lighting circuits, traction transmission and the like of alternating current systems, and can be used as induction heating change-over switches of IH electric cookers and electromagnetic ovens.
The high-end electric cooker on the market at present gradually adopts a plurality of IGBTs to control a plurality of coil panels, improves rice uniformity through switching heating of a plurality of coil panels, but the existing control chip generally only has one IGBT driving port, so that the problem that a plurality of IGBTs cannot be controlled by one driving port is solved, in the prior art, a driving circuit is usually corresponding to each IGBT driving circuit, but the circuit is complex, the cost is high, and therefore the switching when one driving circuit is used for driving a plurality of IGBTs to be switched on or off becomes the problem to be solved in the current stage.
Disclosure of Invention
The invention aims to solve the technical problem of switching when a plurality of IGBTs are driven to be on or off by using one driving circuit, which cannot be realized in the prior art, and provides an IGBT control circuit, a control method, a control circuit of a heating electric appliance and the heating electric appliance.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a plurality of IGBT control circuits are applied to induction heating appliances and comprise at least two IGBTs, at least two switch selection circuits, a driving circuit and a controller, wherein the at least two switch selection circuits and the driving circuit are respectively and correspondingly arranged with the IGBTs,
the input end of each IGBT is externally connected with a heating circuit, the output end of each IGBT is grounded, and the control end of each IGBT is connected with a corresponding switch selection circuit;
the enabling end of each switch selection circuit is connected with the controller, the output end is connected with the driving circuit,
the driving end of the driving circuit is connected with the controller,
the controller is provided with an enabling end corresponding to each switch selection circuit and a driving end corresponding to the driving circuit, and controls the driving circuit and each switch selection circuit to further control the on and off of the corresponding IGBT.
Further, each switch selection circuit comprises a relay, a follow current diode, a triode and a current limiting resistor, wherein one end of a coil of the relay is connected with a collector electrode of the triode, the other end of the coil of the relay is externally connected with a direct current power supply, the coil of the relay is also connected with the follow current diode in parallel, a first contact of the relay is connected with a control end of a corresponding IGBT, a second contact of the relay is connected with the driving circuit, a base electrode of the triode is connected with the current limiting resistor, the current limiting resistor is connected with an enabling end of the controller, and an emitter electrode of the triode is grounded.
Further, the transistor comprises a pull-down resistor which is respectively and correspondingly arranged with the triode, wherein the base electrode of the triode is connected with one end of the pull-down resistor, and the other end of the pull-down resistor is connected with the emitting electrode of the triode and grounded.
Further, the drive circuit includes first resistance, second resistance, third resistance, fourth resistance, the first triode of fifth resistance, second triode, third triode, first electric capacity, the one end of first resistance, second resistance, third resistance external DC power supply respectively, the other end of first resistance passes through the fourth resistance with the base of first triode is connected, the other end of second resistance respectively with the collector of first triode, the base of second triode, the collector of third triode is connected, the other end of third resistance with the collector of second triode is connected, the drive end of connection director between first resistance and the fourth resistance, the projecting pole ground of first triode, the collecting electrode of first triode still respectively with the base of second triode, third triode is connected with first electric capacity and ground, the other end of second resistance still with the third triode is connected with the base of third triode, the second triode is connected with the third electric capacity and the third projecting pole is connected with the base of third triode, the projecting pole is connected with the third electric capacity and the third triode is connected with the third base of third triode.
Further, the controller is a singlechip or MCU.
Further, the over-voltage protection circuit is arranged corresponding to the IGBT respectively, and is electrically connected with the output end of each IGBT and used for providing over-current protection for the IGBT.
Further, the overvoltage protection circuit comprises a voltage stabilizing tube and a matching resistor, the voltage stabilizing tube is connected with the matching resistor in parallel, one end of the voltage stabilizing tube and one end of the matching resistor are connected with the control end of the IGBT, and the other end of the voltage stabilizing tube and the other end of the resistor are connected with the output end of the IGBT and grounded.
A control method for a plurality of IGBT control circuits is provided, which comprises the following steps: the controller controls the drive ends of the drive circuits and the enable ends of the switch selection circuits to further control the on and off of the corresponding IGBTs, so that a plurality of IGBTs are controlled by one drive circuit.
The control circuit of the induction heating electrical appliance comprises a plurality of IGBT control circuits, and further comprises at least two heating circuits which are respectively and correspondingly arranged with the IGBTs, wherein one end of each heating circuit is externally connected with a power supply, the other end of each heating circuit is connected with the input end of each IGBT, and when any IGBT is conducted, the corresponding heating circuit performs induction heating.
Further, the heating circuit comprises a capacitor and a wire coil, and the capacitor and the wire coil are connected in parallel.
An induction heating electric appliance comprises the control circuit of the induction heating electric appliance.
Further, the induction heating electric appliance comprises any one of an induction cooker and an electric cooker.
Compared with the prior art, the IGBT control circuit, the control method, the control circuit of the heating electric appliance and the heating electric appliance provided by the invention have the advantages that the driving circuit and each switch selection circuit are controlled by the controller so as to control the on and off of the corresponding IGBT, the IGBT driving circuit is simplified, the reliability is high, the cost is low, and the application range is wide.
Drawings
FIG. 1 is a diagram of a control circuit for a plurality of IGBTs in accordance with the present invention;
fig. 2 is a control circuit diagram of the induction heating appliance of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention.
As shown in fig. 1, a plurality of IGBT control circuits are applied to an induction heating apparatus, and include three IGBTs, i.e., IGBT1, IGBT2, IGBT3, three switch selection circuits (11, 12, 13) corresponding to IGBT1, IGBT2, IGBT3, respectively, a driving circuit 20, a controller 30, three overvoltage protection circuits (41, 42, 43) corresponding to IGBT1, IGBT2, IGBT3, respectively,
the input ends of the IGBT1, the IGBT2 and the IGBT3 are respectively externally connected with a heating circuit, the output ends are grounded, the control ends are connected with corresponding switch selection circuits, the input ends of the IGBT are collectors, the control ends are grids, and the output ends are emitters;
the drive end IGBT-DRIVER of drive circuit 2 is connected with controller 30, drive circuit 20 includes first resistance R1, second resistance R2, third resistance R3, fourth resistance R4, fifth resistance R5 first triode Q1, second triode Q2, third triode Q3, first electric capacity C1, the one end of first resistance R1, second resistance R2, third resistance R3 external DC power supply respectively, the other end of first resistance R1 passes through fourth resistance R4 with the base of first triode Q1 is connected, the other end of second resistance R2 respectively with the collector of first triode Q1, the base of second triode Q2, the collector of third triode Q3 is connected, the other end of third resistance R3 with the collector of second triode Q2 is connected, the drive end of connecting the controller between first resistance R1 and the fourth resistance R4, the ground of first triode Q1, the third triode Q2 is still connected with the third triode Q2, the base of third triode Q2 is still connected with the third triode Q3, the collector of third triode Q3 is still connected with the third electric capacity Q2, the base of third triode Q3 is still connected with the third triode Q1.
The controller 30 is connected to enable ends (EN 1, EN2, EN 3) of the switch selection circuits (11, 12, 13), the output end is connected to the driving circuit 20, the relays, freewheeling diodes, triodes, current-limiting resistors and pull-down resistors of the switch selection circuits (11, 12, 13) are exemplified by the switch selection circuit 11, the transistor comprises a first relay K1, a first freewheeling diode D1, a fourth triode Q4 and a first current-limiting resistor R6, one end of a coil of the first relay K1 is connected to a collector of the fourth triode Q4, the other end of a coil of the first relay K1 is externally connected with a direct current power supply, the coil of the first relay K1 is connected in parallel with a first freewheeling diode D1, a first contact of the first relay K1 is connected with the control end of the IGBT1, a base of the fourth triode Q4 is connected with the first current-limiting resistor R6, the transistor Q4 can be connected with the fourth triode Q4 through the first freewheeling diode D6, the third triode Q4 is connected with the second freewheeling diode Q4, the other end of the third triode Q4 is connected with the third triode Q4, the emitter of the third triode Q4 is connected with the third triode Q4, the third resistor Q4 is connected with the third resistor is connected with the third triode Q4, the third resistor is connected with the third resistor 3, the third resistor is connected with the third resistor, the third junction resistor is the third junction, and circuits formed by discrete devices, integrated circuits, and the like.
The controller 30 is provided with an enabling end corresponding to each switch selection circuit (11, 12, 13) and a driving end corresponding to the driving circuit 20, and controls the driving circuit 20 and each switch selection circuit (11, 12, 13) to further control the on and off of the corresponding IGBT, and the controller 30 is a singlechip or an MCU.
The overvoltage protection circuits (41, 42, 43) are electrically connected with the output ends of the IGBTs, and are used for providing overcurrent protection for the IGBTs, the overvoltage protection circuits comprise voltage stabilizing tubes and matching resistors, the overvoltage protection circuits 41 comprise a first voltage stabilizing tube D1 and a first matching resistor R12, the first voltage stabilizing tube D1 is connected with the first matching resistor R12 in parallel, one ends of the first voltage stabilizing tube D1 and the first matching resistor R12 are connected with the control end of the IGBTs 1, the other ends of the first voltage stabilizing tube D1 and the first matching resistor R12 are connected with the output end of the IGBTs 1 and grounded, the overvoltage protection circuits 42 comprise a second voltage stabilizing tube D2 and a second matching resistor R13, the overvoltage protection circuits 43 comprise a third voltage stabilizing tube D3 and a third matching resistor R14, and the connection relation is the same as that of the first overvoltage protection circuits 41, and details are omitted.
A control method for a plurality of IGBT control circuits is provided, which comprises the following steps: the controller controls the on and off of the corresponding IGBT through the control of the driving end of the driving circuit and the control of the enabling end of each switch selection circuit, other IGBTs are invalid, the control of a plurality of IGBTs through one driving circuit is realized, in particular,
1) IGBT1 is switched on, IGBT2 and IGBT3 are switched off
IGBT1 switches on, MCU enable end EN1 outputs high level, and fourth triode Q4 switches on, and first relay K1 actuation, drive circuit 20 can normally control IGBT1 break-make state, and IGBT1 drive is effective. MCU drive end IGBT-DRIVER outputs low level, and first triode Q1 does not switch on, and second triode Q2 switches on, and IGBT1 normally switches on, and IGBT2, IGBT3 turn off, and MCU enable end EN2, EN3 output low level, and fifth triode Q5, sixth triode Q6 do not switch on, and second relay K2, third relay K3 disconnection, IGBT2, IGBT3 drive are invalid, and IGBT2, IGBT3 turn off.
2) IGBT2 is turned on, IGBT1, IGBT3 is turned off
IGBT2 is switched on, MCU enable end EN2 outputs high level, and fifth triode Q5 is switched off, and second relay K2 actuation, drive circuit 20 can normally control IGBT2 break-make state, and IGBT2 drive is effective. MCU drive end IGBT-DRIVER outputs low level, and first triode Q1 does not switch on, and second triode Q2 switches on, and IGBT2 can normally switch on, and IGBT1, IGBT3 turn off, and MCU enable end EN1, EN3 output low level, and fourth triode Q4, sixth triode Q6 does not switch on, and first relay K1, third relay K3 disconnection, IGBT1, IGBT3 drive are invalid, and IGBT1, IGBT3 turn off.
3) IGBT3 is on, IGBT1, IGBT2 is off
IGBT3 is switched on, MCU enable end EN3 outputs high level, and sixth triode Q6 is switched off, and third relay K3 actuation, drive circuit 20 can normally control IGBT3 break-make state, and IGBT3 drive is effective. MCU drive end IGBT-DRIVER outputs low level, and first triode Q1 does not switch on, and second triode Q2 switches on, and IGBT3 can normally switch on, and IGBT1, IGBT2 turn off, and MCU enable end EN1, EN2 output low level, and fourth triode Q4, fifth triode Q5 does not switch on, and first relay K1, second relay K2 disconnection, IGBT2, IGBT3 drive are invalid, and IGBT2, IGBT3 turn off.
In this embodiment, only a control circuit of three IGBTs is provided, but the control circuit is not limited to controlling the three IGBTs, which IGBT needs to be controlled, the corresponding switch selection circuit is turned on, the driving circuit is turned on, and the switch selection circuit is turned off, so that other IGBTs are turned off, and the control of multiple IGBTs is realized.
As shown in fig. 2, a control circuit of an induction heating apparatus includes the above-mentioned plurality of IGBT control circuits 100, and further includes three heating circuits (201, 202, 203) corresponding to IGBTs, one end of the heating circuit is externally connected with a power supply, the other end is connected with an input end of the IGBT, when any IGBT is turned on, the corresponding heating circuit performs induction heating, the heating circuit includes a capacitor and a wire coil, taking the heating circuit 201 as an example, the heating circuit 201 includes a second capacitor C2 and a first coil L1, the second capacitor C2 and the first coil L1 are connected in parallel, the heating circuit 202 includes a third capacitor C3 and a second coil L2, the heating circuit 203 includes a fourth capacitor C4 and a third coil L3, and the connection relation is the same as that of the heating circuit 201, which is not repeated here, the heating circuit is oscillated by controlling the high-frequency on-off of the IGBTs, and is charged and discharged at a certain frequency, the control circuit of the induction heating apparatus further includes a rectifier bridge DB and a choke coil, the input ac is changed into a dc current through the rectifier bridge DB, and the choke coil is suppressed from an interference signal, the rectifier bridge is adopted as a rectifier bridge, the rectifier bridge is 15 v, and the ac current is 15 is a and the inductor type of 15 h is a and the inductor type 400 h is formed.
An induction heating electric appliance comprises the control circuit of the induction heating electric appliance, and the induction heating electric appliance comprises an induction cooker, an electric cooker and the like.
Compared with the prior art, the IGBT control circuit, the control method, the control circuit of the heating electric appliance and the heating electric appliance provided by the invention have the advantages that the driving circuit and each switch selection circuit are controlled by the controller so as to control the on and off of the corresponding IGBT, the IGBT driving circuit is simplified, the reliability is high, the cost is low, and the application range is wide.
The foregoing is merely a few specific embodiments of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modification of the present invention by using the concept should be construed as infringement of the protection scope of the present invention.
Claims (11)
1. A plurality of IGBT control circuit is applied to induction heating electrical apparatus, its characterized in that: comprises at least two IGBTs, at least two switch selection circuits respectively corresponding to the IGBTs, a driving circuit and a controller,
the input end of each IGBT is externally connected with a heating circuit, the output end of each IGBT is grounded, and the control end of each IGBT is connected with a corresponding switch selection circuit;
the enabling end of each switch selection circuit is connected with the controller, the output end is connected with the driving circuit,
the driving end of the driving circuit is connected with the controller,
the controller is provided with an enabling end corresponding to each switch selection circuit and a driving end corresponding to the driving circuit, and controls one driving circuit and each switch selection circuit to further control the on and off of the corresponding IGBT;
each switch selection circuit comprises a relay, a follow current diode, a triode and a current limiting resistor, wherein one end of a coil of the relay is connected with a collector electrode of the triode, the other end of the coil of the relay is externally connected with a direct current power supply, the coil of the relay is also connected with the follow current diode in parallel, a first contact of the relay is connected with a control end of a corresponding IGBT, a second contact of the relay is connected with the driving circuit, a base electrode of the triode is connected with the current limiting resistor, the current limiting resistor is connected with an enabling end of the controller, and an emitter electrode of the triode is grounded.
2. The plurality of IGBT control circuits of claim 1, wherein: the transistor is characterized by further comprising pull-down resistors which are respectively and correspondingly arranged with the transistor, wherein the base electrode of the transistor is connected with one end of the pull-down resistor, and the other end of the pull-down resistor is connected with the emitting electrode of the transistor and grounded.
3. The plurality of IGBT control circuits of claim 1, wherein: the driving circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first triode, a second triode, a third triode and a first capacitor, wherein one end of the first resistor, one end of the second resistor and one end of the third resistor are respectively externally connected with a direct current power supply, the other end of the first resistor is connected with a base electrode of the first triode through the fourth resistor, the other end of the second resistor is respectively connected with a collector electrode of the first triode, a base electrode of the second triode and a collector electrode of the third triode, the other end of the third resistor is connected with a collector electrode of the second triode, a driving end of a controller is connected between the first resistor and the fourth resistor, an emitting electrode of the first triode is grounded, a collector electrode of the first triode is also respectively connected with a base electrode of the second triode and the third triode, the collector electrode of the first triode is also connected with the first capacitor and grounded, the base electrode of the second triode is also connected with a base electrode of the third triode, the third triode is connected with a base electrode of the third triode, and the third triode is grounded, and the base electrode of the third triode is connected with the third capacitor and the third triode.
4. The plurality of IGBT control circuits of claim 1, wherein: the controller is a singlechip or MCU.
5. The plurality of IGBT control circuits of claim 1, wherein: the over-voltage protection circuit is electrically connected with the output ends of the IGBTs and is used for providing over-current protection for the IGBTs.
6. The plurality of IGBT control circuits of claim 5, wherein: the overvoltage protection circuit comprises a voltage stabilizing tube and a matching resistor, wherein the voltage stabilizing tube is connected with the matching resistor in parallel, one end of the voltage stabilizing tube and one end of the matching resistor are connected with the control end of the IGBT, and the other end of the voltage stabilizing tube and the other end of the resistor are connected with the output end of the IGBT and grounded.
7. A control method of a plurality of IGBT control circuits, characterized by: a method of controlling a plurality of IGBT control circuits according to any one of claims 1 to 5, the method comprising: the controller controls the drive ends of the drive circuits and the enable ends of the switch selection circuits to further control the on and off of the corresponding IGBTs, so that a plurality of IGBTs are controlled by one drive circuit.
8. A control circuit of an induction heating appliance, characterized in that: the multi-IGBT control circuit comprises the multi-IGBT control circuit as claimed in any one of claims 1-6, and further comprises at least two heating circuits which are respectively and correspondingly arranged with the IGBTs, wherein one end of each heating circuit is externally connected with a power supply, the other end of each heating circuit is connected with the input end of each IGBT, and when any one IGBT is conducted, the corresponding heating circuit carries out induction heating.
9. The control circuit of an induction heating appliance of claim 8, wherein: the heating circuit comprises a capacitor and a wire coil, and the capacitor and the wire coil are connected in parallel.
10. An induction heating appliance, characterized in that: control circuit comprising an induction heating appliance as claimed in any one of claims 8-9.
11. The induction heating appliance of claim 10, wherein: the induction heating electric appliance comprises any one of an induction cooker and an electric cooker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811249285.7A CN109195240B (en) | 2018-10-25 | 2018-10-25 | IGBT control circuit, control method, control circuit of heating electric appliance and heating electric appliance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811249285.7A CN109195240B (en) | 2018-10-25 | 2018-10-25 | IGBT control circuit, control method, control circuit of heating electric appliance and heating electric appliance |
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| CN109195240A CN109195240A (en) | 2019-01-11 |
| CN109195240B true CN109195240B (en) | 2024-04-09 |
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| CN112369927B (en) * | 2020-11-06 | 2022-04-29 | 珠海格力电器股份有限公司 | Multi-segment IH electric cooker control method and device, multi-segment IH electric cooker and storage medium |
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| CN107171557A (en) * | 2017-05-03 | 2017-09-15 | 佛山市顺德区美的电热电器制造有限公司 | A kind of IGBT drive circuit and its voltage adjusting method |
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| CN209497623U (en) * | 2018-10-25 | 2019-10-15 | 珠海格力电器股份有限公司 | A kind of IGBT control circuit, the control circuit of heating electrical appliance, heating electrical appliance |
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2018
- 2018-10-25 CN CN201811249285.7A patent/CN109195240B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204373006U (en) * | 2014-11-28 | 2015-06-03 | 佛山市顺德区美的电热电器制造有限公司 | Electricity cooking pot and control circuit thereof |
| CN205017287U (en) * | 2015-09-18 | 2016-02-03 | 江苏中科君芯科技有限公司 | High -efficient drive circuit of IGBT |
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| CN108347237A (en) * | 2017-08-28 | 2018-07-31 | 九阳股份有限公司 | The control method of electromagnetic heater |
| CN209497623U (en) * | 2018-10-25 | 2019-10-15 | 珠海格力电器股份有限公司 | A kind of IGBT control circuit, the control circuit of heating electrical appliance, heating electrical appliance |
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